Add translations for annotating image sections

backend/de/resource.json

@@ -54,6 +54,7 @@
         "delete_yes": "Ja, so soll es sein. Hinfort damit",
         "preview": "Vorschau",
         "3d_object": "3D-Objekt",
-        "upload_3d_object": "3D-Objekt hochladen"
+        "upload_3d_object": "3D-Objekt hochladen",
+        "image_annotations": "Bild-Anmerkungen"
     }
 }